f = open(r"C:\Users\lilinfeng\Desktop\第二周_第二节tmp.py", "r", encoding="utf-8")
b = f.read()
f.close()

f2 = open(r"C:\Users\lilinfeng\Desktop\第二周_第二节.py", "w", encoding="utf-8")
f2.write(b)
f2.close()
